Refrigeration



C. MILLER REFRIGERATION -July 4, 1944.

Filed Sept. 16, 1941 z x/ x x/ INVENTOR Y a@ T'i'oRNEY Patented July 4, 1 944 BEmGnnaroN Cai-y Miller, Evansvllle, lnd., abslor to Servei,

Inc., New York, N. Y.,

Ware

a corpo'ation of Dela- Application September 13, 1941, Serial No. &10,970

s Claims. (CL 62425 My invention relates to refrigeration and more particularly to transfer of a retrigerating efl'ect from a place where it is produced to aplace where it is to be used at a higher elevation.

It is an object of the invention to carry out a such heat transfer by employing a vaporizationcondensation circuit in which liquid is raised from a lower elevation to a higher elevatio'n by pressure of vapor conservatively produced.

The single figure of the drawing shows more 10 or less diagrammatically a heat transfer 'system embodying the invention.

At a lower elevation, such as in the basement of a store, there is located refrigeration apparaent is hereby incorporated in the present specificatlon. The evaporator III contains a pipe coil II. Above pipe coll Il is a llquid distributor |2 An inlet conduit !3 is arranged to direct liquid refrigerant into distributor I2. 'The liquid refrigerant is deposited by distributor |2 onto coil II. The liquid descends over .the outside of coil ll; evaporating and difiusing into an auxiliary tus including an evaporatr or cooling element Condensation of vapor in coi 4| causes a depressure equalization fluid such as hydrogen. 30

Th evaporation ot liquid on the outside of tube ll produces cooling ot fluid within the tube. Hydrogen enters evaporator III through a conduit M and flows to the top of the evaporator through The mixture of refrigerant a 733 in vesse 23'heats liquid contained ed by a conduit 28 to the header 13 in the re irigerator 23. V Alongside of transfer vessel 23 there is a pressure 'vesse 29. The upper partor vessel 23 is connected to the upper part of vesse 23 by a conduit 33. The lower part of vessel 23 is connected to the lower part of vessel 23 by, a conduit 3l. Communication between vessels 23 and 23 through the lower. conduit 3! is controlled by a valve 32 which is operated by the snap action leverage 33.- When valve 23 and' valve 21 are closed, valve 32 is open, and vice versa. A conduit 33 has a part inside or vessel 23. Vessel 23 jackets this part of ,conduit 33. Conduit ,33 i adapted to conduct water which has been used to cool'the refrigeration apparatus asst'ciated r with the evaporator' I 3 so that the part of conduit in t vesse. i 'The above described circuit is charged with a .volatile {transfer fluid such as, for instance,

methyl' chloride. When 'the refrigera'tio'n' apperatus is operated as described in said Thomas patent, the coil ll is cooled.' This causesfcondensation of methyl chloride 'vapor in coil ll.

crease in pressure in the circuit of which coil l l is a part. Upon such decrease in ressure. liquid in coii !3 evaporates and causes cooling of the refrigeration compartment 23. Vapor resulting froni this evaporation flows from the evapdrator header !3 through conduit l'I into the condenser coil ll., Liquid condensate flows from the lower end of coil Il through conduit 2| into the ac- 5 cumulation vessel 22. Assuming that fioat 33 is down so that valves 23 and 21 are open and 'valve 32 is closed liquid flows from vessel 22 The surface through' conduit 23 into vessel 23. level to! liquid ses in vessel 23, raising float 33 transfer coil s is connected to header l3, and (o During this time; generally referred to as a fintogether therewith forms a second evaporator or cooling element. The evaporator |3 ls' located in an insulated refrigerator storage compartment 23 which may bea display case or walk-in cooler or the like on an upper floor of the store. The 33 23 controlled by a valve 23. The upper end of evaporator coil I I is connected by a part of conduit 1 and a conduit 23 to another opening in the top ortransfer vessel 23 controlled by a valve to an inlet'opening in the top oi' transfer' vessel 30 ing period, not all liquld is admitted into vessel 23 becausevalve 32 is closed. When float 33 has been raised to such an elevation that the' valves are operated to the positions shown in the draw ing, the liquid from vessel 23 flows through now open valve 32 and conduit 3| into vessel 23. Liquid in vesse 23 is heated by conduit 33. The resulting vapor flows through conduit 33 into vessel 23. Valves 23 and 21 now being closed, the vapor accumulation in vessel 23 creates a pressure which forces liquid in vessel 23 through conduit 23 into the evaporator header ll. As

the liquid level goes down in vessel 23, float u descends and sets the valve o ating mechanisn i 21. The bottom ot transtevessel 23 is connect- 53 o' that valves 23 and 21 will sna open and valve period and, since valve 32 then closes down, no

liquid enters the heated vessel 29 until the inltiatioi of another transfer period as described.

Various changes and modiflcations may be made within the scope of the invention as set forth in the following claims.

What is claimed is:

1. A heat transfer system for transferring cooling from a source of refrigeration to a higher elevation including a condenser cooled by said source of refrigeration, an evaporator at said higher elevation, said evaporator always being in open communication with said condenser and connected to deliver vapor to the latter, a vessel connected to receive liqui condensate from said condenser, a condult for conducting liquid from said vessel upward to said evaporator when said vessel is subjected to sufilcient internal pressure to force liquid therefrom through said conduit to said upper elevation, a liquid vaporizer for supplying said pressure in said vessel, said vaporizer being connected to receive liquid from said vessel, and a valve for controlling flow of liquid from said vessel to said vaporizer and operated so that liquid flows to said vaporizer only upon rise in liquid level-in said vessel.

2. A heat transfer system for transferring cooling from a source of refrigeration to a higher elevation including a condenser cooled by said source of refrigeration,` an evaporator at said vessel to said higher elevation, a connection for' higher elevation connected to deliver vapor to i said condenser, a transfer vessel having a liquid inlet and a vent in communication with said condenser, valves controlling' said communication, float operated mechanism for opening and closing said valves responsive to decrease and increase respectively in level of liquid in said vessel, a conduit for conducting liquid from said vessel upward to said evaporator when said vessel is subjected to sufilcient pressure to force liquid therefrom through said conduit to said upper elevation, a heated chamber communicating with said vessel for supply of vapor to the latter, and

a valve for controlling admission of liquid to said chamber from said vessel and operated to open and close when said first `valves close and open respectively.

3. A heat transfer system for transferring cooling from a source of refrigeration to' a higher elevation including a condenser cooled by said source of refrigeration, an evaporator at said higher elevation, said evaporator always being in open communication with said condenser and connected to ,deliver vapor to the latter, a transfer vessel connected to receive liquid condensate from said condenser and deliver liquid upward therefrom to said evaporator at said higher elevation. a heated chamber communicating with -in said transfer vessel.

conducting liquid to said heated chamber, and a valve in said connection for controllng admission' of liquid to said heated chamber and operative to open and close responsive to increase and decrease respectively in quantity of liquid in said vessel.

4. A heat transfer system for transferring cooling from a source of refrigeration to a higher elevation including a condenser cooled by said source ofrefrigeration, an evaporator at said higher elevation, said evaporator always being in open communication with said condenser and connected to deliver vapor to the latter, a transfer vessel connected to receive liquid from said condenser and deliver liquid therefrom to said evaporator at said higher elevation, a vaporizing chamber having a connection to the upper part of said vessel and a connection to the lower part of said vessel, and a'valve controlling said last connection and operative to open and close` responsive to rise and fall respectively of the surface level of liquid in said vessel.

' 5. A heat transfer system for transferringcooling from a source of refrigeration to a higher elevation including a condenser cooled by said source of refrigeration, an evaporator at said higher elevation, said evaporator always being in open communication with said condenser and connected to deliver vapor to the latter, a transfer vessel connected to receive liquid from said 'condenser and deliver liquid therefrom to said to rise and fall respe'ctively of the surface level v of liquid in said vessel. I

6. A heat transfer system for transferring cooling from a source of refrigeration to a higher elevation including a condenser cooled by said source of refrigeration, an evaporator at said higher elevation, said evaporator always being in open communication with said condenser and connected 'to deliver vapor to the latter, a trans-' fer vessel connected to receive liquid from said condenser and deliver liquid 'therefrom to said evaporator at said higher elevation/a vaporizing vessel having small liquid capacity relative to that of said transfer vessel, said vessels being in communication at their upper parts for supply of vapor to said transfer vessel from said vaporizing vessel, said vaporizing vessel being con nected to receive liquid by gravity flow from said transfer vessel, and valve'mechanism for cutting off flow of liquid to said vaporizing vessel responsive to fall of surface level of liquid .GARY 

